My dear French friend, OpenVPN is ridiculously slow.

[dolbykoray]

I really love you my friend, your work is great, greetings from Turkey. I installed the Ubuntu-OpenVPN version but there is a slowness in the system, I tried both with the configuration you suggested and manually, the problem did not go away. I am using speeds close to 300Mbit without VPN, but when I turn on VPN, the speed drops to 20Mbit. How can we solve this?

[dolbykoray]

Please help :'(

[gbnk0]

How is your server's cpu?
Regards

[dolbykoray]

quad core intel xeon cpu no problem 4gb ram 30gb m2ssd, tls very cpu using, how can encrtyp disable?

[gbnk0]

You mean CPU usage is high? How many clients have you?

[dolbykoray]

Thanks for your answer my friend. I can say that I have completely purified Ubuntu, there are only 2 different apps. nmon-openvpn- other apps may be Ubuntu system software, when I checked the cpu usage, openvpn uses cpu heavily, when I started speedtest, when I encrypted the packet numbers, I interpreted it as showing processor heavy usage.

[ruairinewman]

@dolbykoray This may or may not help you, but while running OpenVPN Community on a low-spec AWS instance, I found that the more secure, higher-bit ciphers were significantly more taxing, and resulted in noticeably slower throughput. Have you tried using a 128-bit cipher? While it's not ideal, it might at least narrow down what's causing your performance degradation.